This program is an extension of the ETOPS program from Popular Electronics. This
version allows for full 16-bit addresses.

This program is used by first placing the desired function code on the switches
and then placing the computer into run mode. At this point the computer will wait
for the high portion of the address. Enter the high byte of the address on the
switches and then press the IN button. Then the computer will wait for the low
byte of the address. Again, enter this portion of the address on the switches and
press the IN button. Then the program will perform the requested function:

00 - Run program. The program will execute with R0

01 - Examine Memory. This function allows you to examine memory, while the
IN button is pressed, the data displays will show the next low address
to be displayed. When the IN button is released, the data byte will be
displayed.

02 - Modify Memory. This function allows you to enter bytes into memory. Like
the 01 function, while the IN button is pressed, the low address of the next
address to be written will be displayed, when IN is released the toggles
will be read and the value stored into memory. In this mode the Q led
will be lit to remind you that you are in modify mode.